247890897 has 12 divisors (see below), whose sum is σ = 359631220. Its totient is φ = 164537568.

The previous prime is 247890893. The next prime is 247890931. The reversal of 247890897 is 798098742.

247890897 is a `hidden beast` number, since 2 + 478 + 90 + 89 + 7 = 666.

247890897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 128119761 + 119771136 = 11319^2 + 10944^2 .

It is not a de Polignac number, because 247890897 - 2² = 247890893 is a prime.

It is a super-2 number, since 2×247890897² = 122899793630929218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247890893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58078 + ... + 62199.

Almost surely, 2^247890897 is an apocalyptic number.

It is an amenable number.

247890897 is a deficient number, since it is larger than the sum of its proper divisors (111740323).

247890897 is a wasteful number, since it uses less digits than its factorization.

247890897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120512 (or 120509 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The square root of 247890897 is about 15744.5513432425. The cubic root of 247890897 is about 628.1839841542.

The spelling of 247890897 in words is "two hundred forty-seven million, eight hundred ninety thousand, eight hundred ninety-seven".